Does it sound sacrilegious that we should consider ourselves holy? From the world’s perspective, yes, but not from God’s. It is written, be holy, for I am holy. (1Pet 1:16) Since we are made in His image, it makes sense that we should be holy as well.
Purity is an aspect of holiness. We become holy when we allow the blood of Christ to cover our sins and make us righteous. And everyone who has this hope in Him purifies himself, just as He is pure. (1Jhn 3:3) Whether we feel like it our not, we are holy when we confess our sins and accept that we become sons of God. For you are all sons of God through faith in Christ Jesus. (Gal 3:26)
Even though we are purified through our faith, there is a transformation of our character that never stops. We are bombarded daily by an enemy that wants to see us fall and we don’t always respond the way we should. Repentance should be a lifestyle. Search me, O God and know my heart. Try me and know my anxieties and see if there is any wicked way in me, and lead me in the way everlasting. (Ps 139:23-24)
Any memory of anger, jealousy, pride–any sinful attitude should be confessed. Forgive willingly. If you do not forgive, then you will not be forgiven. (Mat 6:15) Confessing sin, no matter how old, purifies your heart and keeps you in right relationship with God. There is joy in knowing that your heart is pure. A clean conscience and a loving heart will draw blessing from heaven like a magnet. If you do not think that you are holy for reasons that you can name, confess your sin and give it to Jesus. Do no allow the enemy to blame you after that. God forgives and forgets and makes you holy.